#include <QCoreApplication>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    int value = 15;//assign
    qInfo()<<value;

    value+=10;//add
    qInfo()<<value;

    value-=30;//subtract
    qInfo()<<value;

    value*=20;//multiply
    qInfo()<<value;

    value/=25;//divide
    qInfo()<<value;

    return a.exec();
}
